projects / old-projects.git / blame
| Commit | Line | Data |
|---|---|---|
| 6dd70280 JL |
1 | package com.swabunga.spell.engine;\r\r |
| 2 | \r\r | |
| 3 | import java.io.BufferedReader;\r\r | |
| 4 | import java.io.InputStreamReader;\r\r | |
| 5 | \r\r | |
| 6 | /** JMH Again, there is no need to have a global class matrix variable\r\r | |
| 7 | * in this class. I have removed it and made the getDistance static final\r\r | |
| 8 | */\r\r | |
| 9 | public class EditDistance {\r\r | |
| 10 | \r\r | |
| 11 | public static Configuration config = Configuration.getConfiguration();\r\r | |
| 12 | \r\r | |
| 13 | public static final int getDistance(String word, String similar) {\r\r | |
| 14 | int a_size = word.length() + 1;\r\r | |
| 15 | int b_size = similar.length() + 1;\r\r | |
| 16 | int[][] matrix = new int[a_size][b_size];\r\r | |
| 17 | matrix[0][0] = 0;\r\r | |
| 18 | for (int j = 1; j != b_size; ++j)\r\r | |
| 19 | matrix[0][j] = matrix[0][j - 1] + config.getInteger(Configuration.EDIT_DEL1);\r\r | |
| 20 | word = " " + word;\r\r | |
| 21 | similar = " " + similar;\r\r | |
| 22 | int te;\r\r | |
| 23 | for (int i = 1; i != a_size; ++i) {\r\r | |
| 24 | matrix[i][0] = matrix[i - 1][0] + config.getInteger(Configuration.EDIT_DEL2);\r\r | |
| 25 | for (int j = 1; j != b_size; ++j) {\r\r | |
| 26 | if (word.charAt(i) == similar.charAt(j)) {\r\r | |
| 27 | matrix[i][j] = matrix[i - 1][j - 1];\r\r | |
| 28 | } else {\r\r | |
| 29 | matrix[i][j] = config.getInteger(Configuration.EDIT_SUB) + matrix[i - 1][j - 1];\r\r | |
| 30 | if (i != 1 && j != 1 &&\r\r | |
| 31 | word.charAt(i) == similar.charAt(j - 1) && word.charAt(i - 1) == similar.charAt(j)) {\r\r | |
| 32 | te = config.getInteger(Configuration.EDIT_SWAP) + matrix[i - 2][j - 2];\r\r | |
| 33 | if (te < matrix[i][j]) matrix[i][j] = te;\r\r | |
| 34 | }\r\r | |
| 35 | te = config.getInteger(Configuration.EDIT_DEL1) + matrix[i - 1][j];\r\r | |
| 36 | if (te < matrix[i][j]) matrix[i][j] = te;\r\r | |
| 37 | te = config.getInteger(Configuration.EDIT_DEL2) + matrix[i][j - 1];\r\r | |
| 38 | if (te < matrix[i][j]) matrix[i][j] = te;\r\r | |
| 39 | }\r\r | |
| 40 | }\r\r | |
| 41 | }\r\r | |
| 42 | return matrix[a_size - 1][b_size - 1];\r\r | |
| 43 | }\r\r | |
| 44 | \r\r | |
| 45 | public static void main(String[] args) throws Exception {\r\r | |
| 46 | EditDistance ed = new EditDistance();\r\r | |
| 47 | BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));\r\r | |
| 48 | String input = "";\r\r | |
| 49 | String input2 = "";\r\r | |
| 50 | while (input != null) {\r\r | |
| 51 | input = stdin.readLine();\r\r | |
| 52 | input2 = stdin.readLine();\r\r | |
| 53 | System.out.println(ed.getDistance(input, input2));\r\r | |
| 54 | }\r\r | |
| 55 | }\r\r | |
| 56 | }\r\r | |
| 57 | \r\r | |
| 58 | \r\r |